CN206695967U - A kind of vibration experiment - Google Patents
A kind of vibration experiment Download PDFInfo
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- CN206695967U CN206695967U CN201720497493.3U CN201720497493U CN206695967U CN 206695967 U CN206695967 U CN 206695967U CN 201720497493 U CN201720497493 U CN 201720497493U CN 206695967 U CN206695967 U CN 206695967U
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Abstract
The utility model is a kind of vibration experiment.The composition of the system is core controller module, data transfer acquisition module, two-level controller and driving current generation module, electromagnetic vibration platform, sensor assembly and filter module；Wherein, core controller module is connected with data transfer acquisition module；Data transfer acquisition module is connected with two-level controller and driving current generation module, filter module respectively；Sensor assembly is connected with filter module, and two-level controller and driving current generation module are connected with the driving coil inside electromagnetic vibration platform；Five separate acceleration transducers of sensor assembly are fixed on the table top of electromagnetic vibration platform.The utility model takes into account real-time, opening and accuracy, using two-step evolution device, is more accurately vibrated real time data.
Description
Technical field
The utility model device is related to a kind of vibration experiment.The system uses the type of attachment of two-step evolution device, knot
Close and form closed-loop system in modules such as No. five sensors of vibration table surface reasonable layout, controllable shake table vibrate and energy
Vibration test specimen is monitored in real time, there is flexibly open User Exploitation environment and be easy to safeguard the side of being reliably connected extended
Formula.
Background technology
Vibration test is that test specimen is exposed in specific vibration environment, identify its structure and performance whether can bear it is pre-
Vibration environment is counted, verifies the adaptability of product vibration environment and a kind of necessary means of bimetry reliability.
Shake table for vibration test can be divided into three classes from its exciting mode：Mechanical shaker, electric-liquid type vibration
Platform and electromagnetic vibration platform.The wide frequency range of electromagnetic vibration platform, dynamic range are wide, it is easy to accomplish automatically control, be adapted to production
The vibration of raw multiple waveforms, it is a kind of current most popular vibratory equipment.Electromagnetic vibration platform is former according to electromagnetic induction
Reason design：Stage body interior permanent magnets or magnet exciting coil, which are powered, produces stationary magnetic field, and driving coil is in wherein, the drive after energization
Moving winding and magnetic field are interacted, and shake table is produced vibration.
What product was subjected to during manufacture, assembling, transport and use is random vibration environment mostly, true in order to simulate
Real vibration environment, vibration experiment not only will can provide sine vibration test environment, and should be able to provide and shake at random
Dynamic experimental enviroment, and the acceleration power spectral density curve of random vibration should meet the national standard about vibration test.
At present, in the market electromagnetic vibration pilot system prevailing substantially has two kinds to connect and compose form：One of which by
Control cabinet and electromagnetic vibration platform composition, control cabinet be based on monolithic processor controlled frequency converter module, by control cabinet knob or
Shake table is controlled to vibrate by key assignments, the vibration experiment based on type of attachment composition can only realize diversified forms just
Chord vibration；Another kind is driven using the embedded DSP being directly integrated as controller or signal generator, the another power amplifier that is equipped with
Dynamic shake table vibration, using the vibration experiment of the type of attachment, although function has strengthened, due to integration and closing
Property so that it is fixed when running with control mode by product export, and vibration test pattern is single, is unfavorable for the use for having specific demand
The Adjustment Tests pattern of family intuitive and convenient, developed and extended.Generally also deposited using the testing stand of both the above type of attachment
In problems with：Using serial communication or Ethernet interface communication modes transmission data, sigal transfering lag, control effect are caused
Real-time is not high；Closed loop type of attachment is not used, or a sensor is only set in closed loop connection, is accurately shaken it is difficult to know
Dynamic real time data, influences to the accurate control of shake table and the degree of accuracy of vibration test；Also needed when carrying out vibration test to test specimen
Connection analysis of vibration signal register instrument in addition, add hardware connection complexity and financial cost.
Utility model content
The utility model is directed to above-mentioned deficiency, proposes a kind of vibration experiment.The system is towards specific demand user
With the vibration experiment of University Scientific Research faculty, based on electromagnetic vibration platform, using the type of attachment of two-step evolution device, core
Heart controller is set for shake table vibration waveform signal, adjustment extension systemic-function and access control theoretical method are provided and flexibly opened
The platform put, and be used as the monitoring analysis of vibration test；Two-level controller real-time reception core controller is instructed and combined
Hardware circuit accurately generates the signal of driving shake table vibration；Will using the multifunctional data acquisition card for possessing analog output
Two controllers connect, and ensure that core controller instruction to the synchronous transfer of two-level controller and the real-time execution of shake table.And
In five sensors of vibration table reasonable layout, and the module such as filter joint forms closed-loop system, and it is more comprehensively accurate to gather
Vibration real time data, provide reliable hardware foundation for good vibration test environment.
The technical solution of the utility model is：
A kind of vibration experiment, the composition of the system is core controller module, data transfer acquisition module, two level control
Device processed and driving current generation module, electromagnetic vibration platform, sensor assembly and filter module；
Wherein, core controller module is connected with data transfer acquisition module；Data transfer acquisition module respectively with two level
Controller and driving current generation module, filter module are connected；Sensor assembly is connected with filter module, two-level controller
And driving current generation module is connected with the driving coil inside electromagnetic vibration platform；
Five separate acceleration transducers of sensor assembly are fixed on the table top of electromagnetic vibration platform；
Five sensors are in the position of vibration table：First acceleration transducer is located at the center of shake table, with first
Acceleration transducer is the center of circle, and radius is on R circumference, and second, third acceleration transducer, and second, third is distributed with
Acceleration transducer is 90 degree relative to the angle in the center of circle；Second, third acceleration transducer is to the first acceleration transducer
On the extended line of line, the four, the 5th acceleration transducers are respectively fixed with, and the four, the 5th acceleration transducers are to first
The distance of acceleration transducer, it is R/2；
Described core controller module is industrial computer；
Described data transfer acquisition module is multifunctional data acquisition card；
Described filter module is five group of eight rank low pass filter, and every group of eight rank low pass filters and an acceleration pass
Sensor is connected, and every group of eight rank low pass filters are also connected by terminal board with data transfer acquisition module.
Described two-level controller and the composition of driving current generation module include：It is rectification circuit, flat wave circuit, single-phase inverse
Become circuit, low-pass filter circuit, A/D converter, dsp controller and drive circuit, wherein, it is rectification circuit, flat wave circuit, single-phase
Inverter circuit and low-pass filter circuit are sequentially connected, and A/D converter, dsp controller and drive circuit are sequentially connected, drive circuit
Also it is connected with single-phase inversion circuit, low-pass filter circuit is connected with the driving coil inside electromagnetic vibration platform, and data transfer is adopted
Collection module is connected with A/D converter.
The beneficial effects of the utility model are：Hardware type of attachment of the present utility model takes into account real-time, opening and essence
Parasexuality, using two-step evolution device, the analog output mode of multifunctional data acquisition card is especially used without using communication mode,
It ensure that core controller instruction to the synchronous transfer of two-level controller and the real-time execution of shake table, is incorporated in table top and rationally divided
Five sensor groups of cloth are more accurately vibrated real time data, and thus bring more preferably vibration effect into closed-loop system
Fruit and intuitively observation interface, there is flexible development environment and be easy to safeguard that what is extended is reliably connected mode, to specific demand
User and research and teaching personnel have application value.
Brief description of the drawings
The utility model is further illustrated below in conjunction with the accompanying drawings.
Fig. 1 is the overall structure block diagram of utility model device.
Fig. 2 is the internal structure block diagram of utility model device two-level controller and driving current generation module.
Fig. 3 is utility model device acceleration transducer table top installation site figure.
Fig. 4 is utility model device filter module circuit connection diagram.
Fig. 5 a are the display renderings of utility model device vibration real-time waveform；Fig. 5 b are utility model device oscillation powers
Spectrum density display renderings.
Embodiment
The utility model is illustrated below in conjunction with the accompanying drawings, but they are not imposed any restrictions to the utility model.
The utility model is a kind of vibration experiment, and overall structure block diagram is as shown in figure 1, consisting of core controller
Module 1, data transfer acquisition module 2, two-level controller and driving current generation module 3, electromagnetic vibration platform 4, sensor die
Block 5 and filter module 6；
Wherein, electric connection mode is：Core controller module 1 is connected with data transfer acquisition module 2；Data transfer gathers
Module 2 is connected with two-level controller and driving current generation module 3, filter module 6 respectively, two-level controller and driving current
Generation module 3 is connected with the internal drive coil of electromagnetic vibration platform 4；Sensor assembly 5 is connected with filter module 6；Physics connects
The mode of connecing is：Five separate acceleration transducers of sensor assembly 5 are fixed in the table top of electromagnetic vibration platform 4.
Specific connected mode is as described below.
To grind magnificent 610H types industrial computer, the module is passed described core controller module 1 by pci bus interface and data
Defeated acquisition module 2 is connected, and integrates vibrational waveform setting, display, data processing.
Described data transfer acquisition module 2 is multifunctional data acquisition card, specially grinds magnificent PCI-1712 types.The module
Be attached by pci bus interface and core controller module 1, by PCLD-8712 terminal boards respectively with two-level controller
And driving current generation module 3 and filtration module 6 are attached.The utility model utilizes the 1 tunnel simulation in the data collecting card
Output channel and 5 tunnel analog input channels are measured, realize that the real-time output of industrial computer signal and multichannel add by same board
The real-time collection of rate signal, efficiency of transmission are high, and it is anti-interference, isolation performance is good.
Described two-level controller and the input of driving current generation module 3 gathers mould by terminal board and data transfer
Block 2 is connected, and output end is connected with the internal drive coil of electromagnetic vibration platform 4.Its internal structure block diagram is as shown in Fig. 2 in module
Portion's structure composition includes：Rectification circuit, flat wave circuit, single-phase inversion circuit, low-pass filter circuit, A/D converter, DSP controls
Device and drive circuit etc..The preferred AD7891 of the module as A/D converter, preferably TMS320F28335 types DSP as controller,
It is preferred that inversion modules of the Infineon FF150R12ME3G as single-phase inversion circuit.Wherein, power network civil power provides for rectification circuit
AC power, rectification circuit, flat wave circuit, single-phase inversion circuit and low-pass filter circuit are sequentially connected, A/D converter, DSP controls
Device and drive circuit processed are sequentially connected, and drive circuit is also connected with single-phase inversion circuit, low-pass filter circuit and electromagnetic vibration
Driving coil inside platform 4 is connected, and data transfer acquisition module 2 is connected with A/D converter.The module has excessively stream, overvoltage, mistake
The defencive functions such as load.The circuit connecting form of the module and the performance of dsp controller, it is the sinusoidal, random or specified of shake table
Wave-type vibration provides accurately driving current, and energy conversion efficiency is high, current response rate is fast, has higher reliability.
Described electromagnetic vibration platform 4 is known device, and its internal drive coil produces with two-level controller and driving current
Raw module 3 connects, the AC current control signal as caused by module 3, is shaken using electromagnetic induction principle driving electromagnetic vibration platform
It is dynamic.
Described sensor assembly 5 is five separate acceleration transducers, is separately fixed at electromagnetic vibration platform
Countertop segment.It is specific to be preferably the piezoelectric acceleration sensor of Lanace LC0163 types, and select LC0207 constant current source modules pair
Acceleration transducer is powered, to eliminate the Dc bias being superimposed upon on vibration signal and reduce interference.During vibration test, Ge Gejia
Velocity sensor detects the vibration acceleration of each position of electromagnetic vibration platform table top in real time, and is exported in the form of voltage signal
To filter module 6.Five sensors are as shown in Figure 3 in vibration table installation site.Wherein, the first acceleration transducer is located at
The center of shake table, using the first acceleration transducer as the center of circle, radius is on R circumference, and second, third acceleration is distributed with
Sensor, and second, third acceleration transducer is 90 degree relative to the angle at center；Second, third acceleration transducer arrives
On the extended line of the line of first acceleration transducer, the four, the 5th acceleration transducers, and the four, the 5th are respectively fixed with
Acceleration transducer is R/2 to the distance of the first acceleration transducer；Described R is the placement test specimen area of vibration table surface
Radius, according to the system vibration table surface size 75cm, then R is arranged to 30cm to 36cm.The layout method can use
In the case of less number of probes, while reflect vibration table surface different angle and the vibration data feature of diverse location.
Described filtration module 6 is five group of eight rank low pass filter, and specific is preferably the rank Butterworth types of MAX291 eight
Switched capacitor active low-pass filter.Filter module circuit connection diagram is illustrated in figure 4, corresponding one of every group of wave filter adds
The input of velocity sensor, every group of filtered signal deliver to data transfer acquisition module 2 by the connection of terminal board respectively.Entering
During the vibration test of row placement test specimen and fixture, the quantity and position of acceleration transducer and wave filter in module 5 and module 6,
Separately it can increase and adjust according to test specimen size and shape, but acceleration transducer and wave filter should correspond.According to this reality
The characteristics of with novel data acquisition card performance parameters, can at most carry out 16 road single-ended analog amounts inputs, can according to actual conditions,
Voluntarily extended on the premise of the overall signal no more than the collection of 16 tunnels.
Specifically, the course of work of the present utility model is as follows：
First, core controller module 1 grinds magnificent 610H types industrial computer and performs initialization operation, the work(of PCI allocation more than -1712
Input and output range, polarity, the passage of energy data collecting card enable, and set DMA transfer mode etc..
Then, by core controller platform, set in vibration test and shaken according to demand with correlation test standard by user
The related parameter values and test period of dynamic waveform, sinusoidal signal setting amplitude and frequency, random signal set acceleration power spectrum
Density.Core controller calculates vibrational waveform data signal according to setup parameter, passes through more work(of data transfer acquisition module 2
After energy data collecting card carries out D/A conversions, output vibrational waveform analog signalses to two-level controller and driving current produce mould
Block 3, the waveform signal carries out A/D conversions and gathered to two-level controller DSP in module 3, and dsp controller is by after conversion
Digital waveform signal produces the IGBT switching tubes of pulse-width signal control single-phase inversion circuit module compared with triangular wave carrier
Break-make, and then the AC signal for generating and meeting shake table performance requirement, follow setting waveform signal change, low-pass filtered circuit
The vibration of electromagnetic vibration platform is driven afterwards.
At the same time, five acceleration transducers of the sensor assembly 5 that vibration table surface is set are by the acceleration of vibration
Signal is converted to voltage signal, after filtering the filtering of device module 6, and the voltage signal is carried out by data transfer acquisition module 2
Gather and deliver to core controller.In core controller platform, arithmetic mean processing is carried out to five road acceleration signals and shown,
Vibrating effect is analyzed and judged with reference to user's request and sets target parameter, vibrating effect meets the requirements, and continues above-mentioned
The course of work is not changed；Vibrating effect can constantly adjust renewal subsequent time when bad according to user's request and testing standard
Vibration waveform signal.Above-mentioned formal test step is persistently carried out, and test period cut-off then stops experiment.
The utility model vibrates real-time waveform and oscillation power spectrum density respectively such as Fig. 5 a using random vibration test as example
Shown in Fig. 5 b, real-time waveform is clearly smooth, thus it is reliable to have reacted the utility model in the limits of error for power spectral density plot
Hardware connection mode bring preferable vibration test environment and clear and intuitive observation interface.
In the vibration test of carrying fixture and test specimen, separately set up multichannel and be fixed on test specimen key position as monitoring purposes
Acceleration transducer group, its vibrational waveform data can show and preserve in core controller in real time, to carry out in real time
Further analysis and research after monitoring and experiment.
Functional characteristics of the present utility model can be drawn by presented above：
1st, connection is reliable, is easy to extend：Using two-step evolution device, the setting of core controller collection vibrational waveform, display, data
Processing is integrated, and two-level controller and its real-time Switching Core controller of hardware module instruct and precisely generate drive signal；System
System modules independent design, and type of attachment is reliable, is easy to user to safeguard and extend.
2nd, multisensor, the degree of accuracy are high：Reasonable layout is available more comprehensively in five acceleration transducers of vibration table
Accurate real-time vibration data, accurate reference standard is provided for vibration test effect；Closed loop type of attachment and good hardware
It is high to have can guarantee that system performs the control instruction degree of accuracy.
3rd, high-speed transfer, real-time are good：Using the type of attachment for the multifunctional data acquisition card for possessing analog output, make
Core controller instruction is obtained to perform in real time to two-level controller synchronous transfer, shake table；The acceleration signal of shake table vibration is same
When by a high speed gathered in real time, system entirety real-time is good.
4th, convenient, Synchronization Analysis is observed：Test specimen Vibration Condition can separately be set according to actual conditions acceleration transducer gather to
Core controller, vibrating effect and the vibration test specimen Vibration Condition real-time display in core controller of shake table, can be directly perceived
Easily the vibrational waveform of monitoring analysis test specimen, record are with preserving critical data.
The program and agreement that the utility model is related to are carried for device or known technology.
The utility model unaccomplished matter is known technology.
Claims (2)
1. a kind of vibration experiment, it is characterized in that the composition of the system be core controller module, data transfer acquisition module,
Two-level controller and driving current generation module, electromagnetic vibration platform, sensor assembly and filter module；
Wherein, core controller module is connected with data transfer acquisition module；Data transfer acquisition module respectively with Two-stage control
Device and driving current generation module, filter module are connected；Sensor assembly is connected with filter module, two-level controller and drive
Streaming current generation module is connected with the driving coil inside electromagnetic vibration platform；
Five separate acceleration transducers of sensor assembly are fixed on the table top of electromagnetic vibration platform；
Five sensors are in the position of vibration table：First acceleration transducer is located at the center of shake table, accelerates with first
Degree sensor is the center of circle, and radius is on R circumference, second, third acceleration transducer is distributed with, and second, third accelerates
It is 90 degree to spend sensor relative to the angle in the center of circle；Line of second, third acceleration transducer to the first acceleration transducer
Extended line on, be respectively fixed with the four, the 5th acceleration transducers, and the four, the 5th acceleration transducers accelerate to first
The distance of sensor is spent, is R/2；
Described core controller module is industrial computer；
Described data transfer acquisition module is multifunctional data acquisition card；
Described filter module is five group of eight rank low pass filter, every group of eight rank low pass filters and an acceleration transducer
It is connected, every group of eight rank low pass filters are also connected by terminal board with data transfer acquisition module.
2. vibration experiment as claimed in claim 1, it is characterized in that described two-level controller and driving current produce mould
The composition of block includes：Rectification circuit, flat wave circuit, single-phase inversion circuit, low-pass filter circuit, A/D converter, dsp controller
And drive circuit, wherein, rectification circuit, flat wave circuit, single-phase inversion circuit and low-pass filter circuit are sequentially connected, A/D conversions
Device, dsp controller and drive circuit are sequentially connected, and drive circuit is also connected with single-phase inversion circuit, low-pass filter circuit and electricity
Driving coil inside magnetic-type shake table is connected, and data transfer acquisition module is connected with A/D converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720497493.3U CN206695967U (en) | 2017-05-08 | 2017-05-08 | A kind of vibration experiment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720497493.3U CN206695967U (en) | 2017-05-08 | 2017-05-08 | A kind of vibration experiment |
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| CN206695967U true CN206695967U (en) | 2017-12-01 |
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| CN201720497493.3U Expired - Fee Related CN206695967U (en) | 2017-05-08 | 2017-05-08 | A kind of vibration experiment |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110624807A (en) * | 2018-06-21 | 2019-12-31 | 刘云轩 | All-digital electromagnetic vibration table system and working method thereof |
| CN113160535A (en) * | 2021-05-13 | 2021-07-23 | 公安部第三研究所 | Method for realizing intelligent vibration test for optical fiber vibration intrusion detector |
| CN113256951A (en) * | 2021-05-13 | 2021-08-13 | 公安部第三研究所 | System for realizing feedback type vibration recording and simulation test aiming at vibration intrusion detector |
-
2017
- 2017-05-08 CN CN201720497493.3U patent/CN206695967U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110624807A (en) * | 2018-06-21 | 2019-12-31 | 刘云轩 | All-digital electromagnetic vibration table system and working method thereof |
| CN113160535A (en) * | 2021-05-13 | 2021-07-23 | 公安部第三研究所 | Method for realizing intelligent vibration test for optical fiber vibration intrusion detector |
| CN113256951A (en) * | 2021-05-13 | 2021-08-13 | 公安部第三研究所 | System for realizing feedback type vibration recording and simulation test aiming at vibration intrusion detector |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171201 |